Integrated Device Technology, Inc.
DESCRIPTION:
The IDT54/74FCT139T/AT/CT are dual 1-of-4 decoders
built using an advanced dual metal CMOS technology. These
devices have two independent decoders, each of which
accept two binary weighted inputs (A
0
-A
1
) and provide four
mutually exclusive active LOW outputs (
O
0
-
O
3
). Each de-
coder has an active LOW enable (
E
). When
E
is HIGH, all
outputs are forced HIGH.
IDT54/74FCT139T/AT/CT
FAST CMOS DUAL
1-OF-4 DECODER
WITH ENABLE
FUNCTIONAL BLOCK DIAGRAM
PIN CONFIGURATIONS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
APRIL 1995
1995 Integrated Device Technology, Inc.
6.4
DSC-4218/3
E
a
A
0a
A
1a
O
0a
O
1a
O
2a
O
3a
E
b
A
0b
A
1b
O
0b
O
1b
O
2b
O
3b
2566 drw 01
2566 drw 02
2566 drw 03
O
3b
INDEX
A
1a
A
1b
E
a
NC
V
CC
LCC
TOP VIEW
3
2
20 19
1
4
5
6
7
8
18
17
16
15
14
9 10 11 12 13
L20-2
O
0a
NC
O
1a
O
2a
A
0b
NC
O
0b
O
1b
A
0a
O
3a
O
2b
GND
NC
E
b
1
FEATURES:
Std., A and C speed grades
Low input and output leakage
1
A (max.)
CMOS power levels
True TTL input and output compatibility
V
OH
= 3.3V (typ.)
V
OL
= 0.3V (typ.)
High drive outputs (-15mA I
OH
, 48mA I
OL
)
Meets or exceeds JEDEC standard 18 specifications
Product available in Radiation Tolerant and Radiation
Enhanced versions
Military product compliant to MIL-STD-883, Class B
and DESC listed (dual marked)
Available in DIP, SOIC, QSOP, CERPACK and
LCC packages
GND
E
a
E
b
O
3b
V
CC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
DIP/SOIC/QSOP/CERPACK
TOP VIEW
P16-1
D16-1
SO16-1
SO16-7
&
E16-1
A
0a
A
1a
O
0a
O
1a
O
2a
O
3a
A
0b
A
1b
O
0b
O
1b
O
2b
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
6.4
2
MILITARY AND COMMERCIAL TEMPERATURE RANGES
IDT54/74FCT139T/AT/CT
FAST CMOS DUAL 1-OF-4 DECODER WITH ENABLE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Commercial: T
A
= 0
C to +70
C, V
CC
= 5.0V
5%; Military: T
A
= 55
C to +125
C, V
CC
= 5.0V
10%
NOTES:
2566 tbl 05
1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at V
CC
= 5.0V, +25
C ambient and maximum loading.
3. Not more than one output should be shorted at one time. Duration of the short circuit test should not exceed one second.
4. The test limit for this parameter is
5
A at T
A
= 55
C.
Symbol
Parameter
Test Conditions
(1)
Min.
Typ.
(2)
Max.
Unit
V
IH
Input HIGH Level
Guaranteed Logic HIGH Level
2.0
--
--
V
V
IL
Input LOW Level
Guaranteed Logic LOW Level
--
--
0.8
V
I
I H
Input HIGH Current
(4)
V
CC
= Max.
V
I
= 2.7V
--
--
1
A
I
I L
Input LOW Current
(4)
V
CC
= Max.
V
I
= 0.5V
--
--
1
A
I
I
Input HIGH Current
(4)
V
CC
= Max., V
I
= V
CC
(Max.)
--
--
1
A
V
IK
Clamp Diode Voltage
V
CC
= Min., I
N
= 18mA
--
0.7
1.2
V
I
OS
Short Circuit Current
V
CC
= Max.
(3)
, V
O
= GND
60
120
225
mA
V
OH
Output HIGH Voltage
V
CC
= Min.
V
IN
= V
IH
or V
IL
I
OH
= 6mA MIL.
I
OH
= 8mA COM'L.
2.4
3.3
--
V
I
OH
= 12mA MIL.
I
OH
= 15mA COM'L.
2.0
3.0
--
V
V
OL
Output LOW Voltage
V
CC
= Min.
V
IN
= V
IH
or V
IL
I
OL
= 32mA MIL.
I
OL
= 48mA COM'L.
--
0.3
0.5
V
V
H
Input Hysteresis
--
--
200
--
mV
I
CC
Quiescent Power Supply Current
V
CC
= Max.
V
IN
=
GND or
V
CC
--
0.01
1
mA
CAPACITANCE
(T
A
= +25
C, f = 1.0MHz)
NOTE:
1. This parameter is measured at characterization but not tested.
2566 lnk 04
Symbol
Parameter
(1)
Conditions
Typ.
Max. Unit
C
IN
Input
Capacitance
V
IN
= 0V
6
10
pF
C
OUT
Output
Capacitance
V
OUT
= 0V
8
12
pF
PIN DESCRIPTION
2566 tbl 01
ABSOLUTE MAXIMUM RATINGS
(1)
NOTES:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RAT-
INGS may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other conditions
above those indicated in the operational sections of this specification is
not implied. Exposure to absolute maximum rating conditions for
extended periods may affect reliability. No terminal voltage may exceed
V
CC
by +0.5V unless otherwise noted.
2. Input and V
CC
terminals only.
3. Outputs and I/O terminals only.
Symbol
Rating
Commercial
Military
Unit
V
TERM(2)
Terminal Voltage
with Respect to
GND
0.5 to +7.0
0.5 to +7.0
V
V
TERM(3)
Terminal Voltage
with Respect to
GND
0.5 to
V
CC
+0.5
0.5 to
V
CC
+0.5
V
T
A
Operating
Temperature
0 to +70
55 to +125
C
T
BIAS
Temperature
Under Bias
55 to +125
65 to +135
C
T
STG
Storage
Temperature
55 to +125
65 to +150
C
P
T
Power Dissipation
0.5
0.5
W
I
OUT
DC Output
Current
60 to +120 60 to +120 mA
2566 lnk 03
FUNCTION TABLE
(1)
NOTE:
2566 tbl 02
1. H = HIGH Voltage Level
;
L = LOW Voltage Level; X = Don't Care
Pin Names
Description
A
0
, A
1
Address Inputs
E
Enable Input (Active LOW)
O
0
-
O
3
Outputs (Active LOW)
Inputs
Outputs
E
E
A
0
A
1
O
O
0
O
O
1
O
O
2
O
O
3
H
X
X
H
H
H
H
L
L
L
L
H
H
H
L
H
L
H
L
H
H
L
L
H
H
H
L
H
L
H
H
H
H
H
L
IDT54/74FCT139T/AT/CT
FAST CMOS DUAL 1-OF-4 DECODER WITH ENABLE
MILITARY AND COMMERCIAL TEMPERATURE RANGES
6.4
3
POWER SUPPLY CHARACTERISTICS
Symbol
Parameter
Test Conditions
(1)
Min.
Typ.
(2)
Max.
Unit
I
CC
Quiescent Power Supply Current
TTL Inputs HIGH
V
CC
= Max.
V
IN
= 3.4V
(3)
--
0.5
2.0
mA
I
CCD
Dynamic Power Supply
Current
(4)
V
CC
= Max.
Outputs Open
One Bit Toggling
50% Duty Cycle
V
IN
= V
CC
V
IN
= GND
--
0.15
0.3
mA/
MHz
I
C
Total Power Supply Current
(6)
V
CC
= Max.
Outputs Open
f
o
= 10MHz
V
IN
= V
CC
V
IN
= GND
--
1.5
4.0
mA
50% Duty Cycle
One Input and
One Output Toggling
V
IN
= 3.4V
V
IN
= GND
--
1.8
5.0
V
CC
= Max.
Outputs Open
f
o
= 10MHz
V
IN
= V
CC
V
IN
= GND
--
3.0
7.0
(5)
50% Duty Cycle
One Input Toggling
on Each Decoder
Two Outputs Toggling
V
IN
= 3.4V
V
IN
= GND
--
3.5
9.0
(5)
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
NOTES:
2566 tbl 07
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
2566 tbl 06
NOTES:
1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at V
CC
= 5.0V, +25
C ambient.
3. Per TTL driven input (V
IN
= 3.4V). All other inputs at V
CC
or GND.
4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations.
5. Values for these conditions are examples of the I
CC
formula. These limits are guaranteed but not tested.
6. I
C
= I
QUIESCENT
+ I
INPUTS
+ I
DYNAMIC
I
C
= I
CC
+
I
CC
D
H
N
T
+ I
CCD
(f
O
N
O
)
I
CC
= Quiescent Current
I
CC
= Power Supply Current for a TTL High Input (V
IN
= 3.4V)
D
H
= Duty Cycle for TTL Inputs High
N
T
= Number of TTL Inputs at D
H
I
CCD
= Dynamic Current Caused by an Input Transition Pair (HLH or LHL)
f
O
= Output Frequency
N
O
= Number of Outputs at f
O
All currents are in milliamps and all frequencies are in megahertz.
FCT139T
FCT139AT
FCT139CT
Com'l.
Mil.
Com'l.
Mil.
Com'l.
Mil.
Parameter
Description
Condition
(1)
Min.
(2)
Max. Min.
(2)
Max.
Min.
(2)
Max. Min.
(2)
Max. Min.
(2)
Max. Min.
(2)
Max.
Unit
t
PLH
t
PHL
Propagation Delay
A
0
or A
1
to
O
n
C
L
= 50pF
R
L
= 500
1.5
9.0
1.5
12.0
1.5
5.9
1.5
7.8
1.5
5.0
1.5
6.2
ns
t
PLH
t
PHL
Propagation Delay
E
to
O
n
1.5
8.0
1.5
9.0
1.5
5.5
1.5
7.2
1.5
4.8
1.5
5.8
ns
6.4
4
MILITARY AND COMMERCIAL TEMPERATURE RANGES
IDT54/74FCT139T/AT/CT
FAST CMOS DUAL 1-OF-4 DECODER WITH ENABLE
TEST CIRCUITS AND WAVEFORMS
TEST CIRCUITS FOR ALL OUTPUTS
ENABLE AND DISABLE TIMES
PROPAGATION DELAY
SET-UP, HOLD AND RELEASE TIMES
PULSE WIDTH
SWITCH POSITION
Pulse
Generator
R
T
D.U.T.
V
CC
V
IN
C
L
V
OUT
50pF
500
500
7.0V
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
DATA
INPUT
TIMING
INPUT
ASYNCHRONOUS CONTROL
PRESET
CLEAR
ETC.
SYNCHRONOUS CONTROL
t
SU
t
H
t
REM
t
SU
t
H
HIGH-LOW-HIGH
PULSE
LOW-HIGH-LOW
PULSE
t
W
1.5V
1.5V
SAME PHASE
INPUT TRANSITION
3V
1.5V
0V
1.5V
V
OH
t
PLH
OUTPUT
OPPOSITE PHASE
INPUT TRANSITION
3V
1.5V
0V
t
PLH
t
PHL
t
PHL
V
OL
CONTROL
INPUT
3V
1.5V
0V
3.5V
0V
OUTPUT
NORMALLY
LOW
OUTPUT
NORMALLY
HIGH
SWITCH
CLOSED
SWITCH
OPEN
V
OL
0.3V
0.3V
t
PLZ
t
PZL
t
PZH
t
PHZ
3.5V
0V
1.5V
1.5V
ENABLE
DISABLE
V
OH
PRESET
CLEAR
CLOCK ENABLE
ETC.
Test
Switch
Disable Low
Enable Low
Closed
All Other Tests
Open
Open Drain
DEFINITIONS:
C
L
=
Load capacitance: includes jig and probe capacitance.
R
T
=
Termination resistance: should be equal to Z
OUT
of the Pulse
Generator.
2566 lnk 08
2566 drw 06
NOTES:
1. Diagram shown for input Control Enable-LOW and input Control Disable-
HIGH
2. Pulse Generator for All Pulses: Rate
1.0MHz; t
F
2.5ns; t
R
2.5ns
2566 drw 08
2566 drw 05
2566 drw 04
2566 drw 07
IDT54/74FCT139T/AT/CT
FAST CMOS DUAL 1-OF-4 DECODER WITH ENABLE
MILITARY AND COMMERCIAL TEMPERATURE RANGES
6.4
5
ORDERING INFORMATION
XX
Temp. Range
XXXX
Device Type
X
Package
X
Process
Blank
B
P
D
SO
L
E
Q
139T
139AT
139CT
Commercial
MIL-STD-883, Class B
Plastic DIP
CERDIP
Small Outline IC
Leadless Chip Carrier
CERPACK
Quarter-size Small Outline Package
Dual 1-of-4 Decoder
54
74
55
C to +125
C
0
C to +70
C
FCT
IDT
X
Family
Blank
High Drive
2566 drw 09
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